<template>
  <!-- 商品分类导航 -->
  <div class="type-nav">
    <div class="container">
      <div @mouseenter="navIsEnter=true" @mouseleave="navIsEnter=false">
        <h2 class="all">全部商品分类</h2>
        <div class="sort" v-show="sortIsShow">
          <div class="all-sort-list2"  @click="toSearch" @mouseleave="itemCategoryListLeave" @mouseenter="isLeave=false" >
            <div class="item"  :class="index === current ? 'active' : ''" @mouseenter="itemCategoryListThrottle(index)" v-for="(one,index) in categoryList1" :key="one.categoryId">
              <h3>
                <a
                    :data-category1Id="one.categoryId"
                    :data-categoryName = "one.categoryName"
                >{{one.categoryName}}</a>
              </h3>
              <div class="item-list clearfix">
                <div class="subitem">
                  <dl class="fore" v-for="two in one.categoryChild" :key="two.categoryId">
                    <dt>
                      <a
                          :data-category2Id="two.categoryId"
                          :data-categoryName = "two.categoryName"
                      >{{two.categoryName}}</a>
                    </dt>
                    <dd>
                      <em v-for="three in two.categoryChild" :key="three.categoryId">
                        <a
                            :data-category3Id="three.categoryId"
                            :data-categoryName = "three.categoryName"
                        >{{three.categoryName}}</a>
                      </em>
                    </dd>
                  </dl>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
      <nav class="nav">
        <a href="###">服装城</a>
        <a href="###">美妆馆</a>
        <a href="###">尚品汇超市</a>
        <a href="###">全球购</a>
        <a href="###">闪购</a>
        <a href="###">团购</a>
        <a href="###">有趣</a>
        <a href="###">秒杀</a>
      </nav>
    </div>
  </div>
</template>

<script>
import {mapActions,mapState} from "vuex"
import {throttle} from "lodash"
export default {
  name: "TypeNav",
  data(){
    return{
      current:-1,
      isLeave:true,
      navIsEnter:false
    }
  },
  mounted() {
    this.getCategoryList()

    this.itemCategoryListThrottle = throttle(this.itemCategoryListEnter,100,{
      leading:true,
      trailing:true,
    })
  },
  methods:{
    ...mapActions("category",["getCategoryList"]),

    itemCategoryListEnter(index) {
        if(this.isLeave) return
        this.current = index
    },
    itemCategoryListLeave(){
      this.isLeave = true
        this.current = -1
    },
    itemCategoryListThrottle() {
    },
    //事件委派
    toSearch(e) {
      const {
        categoryname:categoryName,
        category1id:category1Id,
        category2id:category2Id,
        category3id:category3Id,
      } = e.target.dataset

      if(!categoryName) return

      const params = this.$route.params
      this.$router.push({
        name:"search",
        query:{
          categoryName,
          category1Id,
          category2Id,
          category3Id
        },
        params
      })
  }
  },
  computed:{
    ...mapState("category",["categoryList1"]),

    sortIsShow(){
      if(this.$route.name === "home") return true
      return this.navIsEnter
    }

    },
    watch:{
      $route(){
        this.navIsEnter = false
      }
    }
}
</script>

<style scoped lang="less">
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      position: absolute;
      background: #fafafa;
      z-index: 999;

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;

            a {
              color: #333;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &.active {
            &>h3{
              background-color: lightskyblue;
            }
            .item-list {
              display: block;
            }
          }
        }
      }
    }
  }
}
</style>